drm/nouveau/bios/init: handle INIT_RESET_BEGUN devinit opcode

Signal that the reset sequence has begun.

This opcode signals that the software reset sequence has begun.
Ordinarily, no actual operations are performed by the opcode.
However it allows for possible software work arounds by devinit
engines in software agents other than the VBIOS, such as the resman,
FCODE, and EFI driver.

Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
index 3f4f27d191aec9e8d4d92a8055af18c480dc29b8..5e02832304e2152d4d66d86758a2f722d903de87 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
@@ -1934,6 +1934,17 @@ init_ram_restrict_pll(struct nvbios_init *init)
        }
 }
 
+/**
+ * INIT_RESET_BEGUN - opcode 0x8c
+ *
+ */
+static void
+init_reset_begun(struct nvbios_init *init)
+{
+       trace("RESET_BEGUN\n");
+       init->offset += 1;
+}
+
 /**
  * INIT_GPIO - opcode 0x8e
  *
@@ -2260,7 +2271,7 @@ static struct nvbios_init_opcode {
        [0x79] = { init_pll },
        [0x7a] = { init_zm_reg },
        [0x87] = { init_ram_restrict_pll },
-       [0x8c] = { init_reserved },
+       [0x8c] = { init_reset_begun },
        [0x8d] = { init_reserved },
        [0x8e] = { init_gpio },
        [0x8f] = { init_ram_restrict_zm_reg_group },